Comb



FIG. 1 is a side elevational view showing my new design for a comb;

FIG. 2 is an elevational view seen from the left side of FIG. 1, the side opposite being identical to the side shown;

FIG. 3 is a top plan view of my new design for a comb; and,

FIG. 4 is a bottom plan view thereof. 

The ornamental design for a comb, as shown and described. 